Internal-combustion engine



A. L. POWELL. INTERNAL COMBUSTION ENGINE. APPLICATION'HLED FEB. 2, 1921.

Patented Oct 31, 1922 2 SHEETS-SHEET I. B

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. POWELL INTERNAL COMBUSTION ENGINE.

APPLICATION FILED FEB. 2,1921.

Patentefi Oct. 31, 1922.

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-LVAI-I L. POWELL, O33 ll'lILES CITY. lllffll l'l n il l'rl, fafiSlGNoPt TO THE L. POW ELL POWER- 00., INC., 035 MILES CITY, MONTANA, A BODY CORPORATE.

IDl'TEENAL-GOT/[BUSTION ENGINE.

Application filed Eebruaryfi, 1921. Serial No. e l-1,570.

To all whom it, may concern:

Be it known that ALvaI-r L. FownLL, a citizen or the United States. residing at Miles City, in the county of (luster and tr tate of lrlontana, has invented certa n new and sciul Improvements in internal-Oombustion Engines, of which the 'tollowing is a specification.

lily invention relates to lUllH'OVQIDQIltS in internal combustion engines in which I em ploy a novel means of introducing the charge in the cylinder, and fire the compressed mix ture by a method that makes an engine equipped with my improvement more self contained than another. I. am also able to more positively proportion the fuel elements securing, thereby, greater combustion efliciency. In the accompanying drawings I show a form of my improvement, in which- Fig. l is a sectional elevation of the vtuel and power pistons, with essential related parts.

F ig. 2 is a sectional elevation of an engine that'includes my improvement.

Fig. 3 is a plan, showing arrangement of combustion, air and gas cylinders.

Figs. a, 5, are d'agrams ot the operation through a cycle.

Figs. 6, 7, are sectional elevations or engine, the parts being shown at diii'erent points oi stroke.

F 8 is an elevation o1 the tool piston, the lug on head being broken off.

Fig. 9 is a section on a.b.

Fig. 10 is a section on ccZ.

In Fig. 1.. a cylinder, A, water jacketed at A 30-, in which a power piston A is slidably mounted. In the upper part 0i .i. is a second piston, A having a diameter preferably smaller than that of A Piston A carries a wrist pin A on which is hung a connecting rod. A fitted to a crank, A, of engine shaft, O", by a wrist pin, A]. On the upper side of cylinder A are lugs, As, Fi 2. Only one of these appears in the given view. Through these lugs a pin. A, SQHPPOltS a pivoted lever, 13. Similar lugs, B on secondary piston A carry a pin. PF, that engages a groove in end of lever B, Fig. 2. From the other end or B a crank rod, B supported by a pin, 3, Fig. 1. Cam rod B is supported, in its vertical movement. by a drilled lug, B On lower end of said cam rod a roller, B, Fig. 2. en-

gages a groove in a positive cam. B The engine may be one oi? one or more cylinders. but in this application multiple cylinders are assumed, as shown in plan, 3. It will be noted that at the right .lrand end. are two independent cylinders. .l liese. are. respectively, li B". Cylinder B is for compressing air. In it moves a "piston, C, from which a connecting rod. O connects it to a crank, O on a shaft, Oh (Fig. 2). l Frist pins O O, are of the conventional t n-m, providing for the oscillation of rod L Oyllnder B has piston, wrist pin, and connecting rod similar to those in cylinder B and connected to a crank on shaft (3, (dotted lines, Fig. 2) by the same means used with the other cranks. The power shaft O is on a line parallel with shafts O O, and the three are joined by the large diameter gear. O that meshes with the pinions O O (pinion O is shown in dotted lines, Fig. 2). Only one operating cam, B is shown. Figs. 2, G, T. This cam is prefer ably keyed to a shaft D on which is a gear, lT", (dotted lines, Figs. 2-, 6, 7), that meshes with a pinion, D on power shaft O The pstons in cylinders B B make two stro 'es to one oi the power piston 93, and the cam shaft D makes one revolution to two of the power shaft.

From air cylinder B a pipe passes along the upper side of power cylinders (Fig. 3) and connects with each of them by means oil? branches, D On the opposite side similar connection is made between power and fuel cylinder B, by the pipe D", and branches, Fig. 3. Check valves D D, Figs. 1, 2, 3, are placed in the branches for purposes to be described.

The operation of the engine is as follows:

On outstroke of piston A it is followed by the secondary piston A Piston A is divided into annular chambers E, E each of which connects with a series of holes in the circumference of A Figs. 1, 8. In Fig. 9 a section on (0-1), Fig. 8, is given, the related piston chambers E, E being shown; while in Fig. 10, the circumferential holes are shown on section cd, Fig. 8. As pistons A A advance the row of holes designated E Fig. 8, uncovers and an explosive charge carried in annular chamber E exhausts into space between piston A aiston A and head of cylinder A.

The expression exhaust is here intended to indicate an equalization of pressures between the said cylinder space and that within the said annular space. The second row of holes, F' next uncovers, liberating a charge of air previously compressed to ignition temperature. The power charge is fired by this, and piston A continues on, the balance of its stroke developing power. Piston A moved by cam B remains stationary until return of A During this stroke operable exhaust valve E opens and the burned charge passes out by said valve. At latter part of clearance stroke cam 13 returns piston A to the original position shown in Fig. 1'. On suction outstroke inlet valve opens, admitting a charge of air. On succeeding clearance stroke this air is driven out through valve E which had closed on suction end and re-opened on return of piston A The indrawn and exhausted air not only makes scavenging more thorough, but aids in cooling cylinder and piston.

The annular chamber, E is charged from pipe line D, that runs to cylinder B. In this cylinder air and fuel are drawn from a carburetor, or other source, not shown, through check valve E, Figs. 6, 7. The piston in said cylinder compresses the mixed charge into pipe line D through. check valve D Fig. 2, from which it enters the annular piston chamber E by the port shown in Fig. 1, at E During the movement of piston A it acts as a piston valve, closing port E as it descends.

The air compression is effected in cylinder B The action is exactly the same as that already described for cylinder B". Air is taken in from. atmosphere through a check valve, H. The highly compressed air passing into annular chamber E,

tion occurs at a point :0,.'Fig.5,-and the impulse isthrough the areas-3, Thepiston A moves upward on the arc Z-m, and down on the arc m-m. In Fig. 4, the detail operation of piston A is shown, according to its cycle. T

v I thus obtain an engine relatively simple, self-igniting, and, positively charged from communicate I a self-contained source operating within the structure itself.

What I believe is new and. ask to have protected by Letters Patent, is b In an internal combustion engine,a power piston, a secondary piston, annular spaces in said secondary piston, holes from the said annular spaces to the circumferential face of said secondary piston, means for charging one of said annular spaces with a fuel charge, means for charginganother annular space in said secondary piston with air compressed to ignition temperature, cylinders within which said pistons operate, intake and outlet valves, operable means for said outlet valve, a power shaft, and means for rotating said power shaft by the move ment of said power piston, substantially as described. l

In testimony whereof I affix my signature.

Y ALVAH L. POWELL. 

